Give them another week or two....They could have still been immature when you threw them into flowering....When I used to run seeds i wouldnt throw them into the flower chamber until I actually saw some Preflowers on them...thats a good way to tell that your plant is mature and ready to flower....If you didnt see any preflowers on them when you started 12/12 then they werent Mature yet but no Biggies it will just take longer....Look for 2 little white hairs and then you'll know you have a female..have they began there stretch yet????.Good luck..~ograskal